*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    text-decoration: none;
}
.w1280{
    margin: 0 auto;
    width: 1280px;
}
body {
    background-color: #efefee;
}

.box {
    display: flex;
}

.display {
    width: 200px;
    height: 500px;
    background-color: #f7f7f7;
}

.display .title{
    display: flex;
    padding: 10px;
}

.display .title img {
    width: 30px;
    height: 30px;
}

nav #nav{
    height: 300px;
    width: 200px;
}
nav li{
    cursor: pointer;
}
nav #nav li{
    height: 36px;
    list-style: none;
    text-align: center;
    padding-right: 38px;
    font-size: 10px;
}
nav #nav li:nth-child(4){
    font-weight: 600;
}
nav li.active{
    background-color:#fffae2;
    border-left:4px solid #f59a17;
    color: #facd80;
}

nav #nav li {
    font-size: 13px;
}

.right{
    width: 1080px;
    background-color: #f7f7f7;
    margin-left: 5px;
}

.right-t{
    width: 100%;
    font-size: 24px;
    font-weight: 700;
    margin: 20px;
}

.right-b{
  width: 100%;
  display: flex;
}

.right-b .l{
  width: 400px;
  height: 600px;
  padding-left: 50px;
}

.right-b .ll{
  width: 400px;
  height: 600px;
}

.right-b dt{
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 5px;
}

.right-b dd{
  font-size: 14px;
  margin-bottom: 3px;
}